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Detection of low-velocity impact damage in glass/epoxy tubes by the penetrant method

1998-02-01
Doyum, Ahmet Bülent
Altay, B
In this study, detection possibility of different types of defects produced as a result of low-velocity transverse impact loading on (+/-45 degrees(2), 90 degrees) S-glass and (+/-54 degrees(3), 90 degrees) E-glass fibre-reinforced epoxy tubular specimens were investigated. Visual inspection, water-washable red dye, water-washable fluorescent and post-emulsified fluorescent penetrant systems were utilised for damage detection. A test set-up was designed and manufactured for producing low-velocity transverse impact at energy levels ranging between 3.5-8.5 J. Cracks of different size and nature, and delamination zones caused by impact were detected using the above-mentioned non-destructive inspection techniques. Results obtained from each system are presented in tabular form, allowing quantitative comparison.